Torsion spring vibratory finishing machine



March 2, 1965 w. v. SPURLIN TAL 3,171,235

'ronsrou SPRING VIBRAToRy FINIsHmG MACHINE piled July z, 1962 4 Sheets-Sheet 1 w i rfv Mulan M BYW/unu E. lm mi Tune A rrumvfv f 3,171,235 ToRsIoN SPRING VIBRATORY FINISHING MACHINE Filed July 2. 1962 March 2,v 1965 w. v. sPuRLlN ETAL 4 Sheets-Sheet 2 mum usP/Rsd MgVL/AME. BEA rrr THE/@Arronue'v Mal'h 2, 1965 w. v. sPuRLlN E'rAl. 3,171,235

ToRsIon spams vIBRATonY F'mxsamc uAcHmE 4 Sheets-Sheet 3 Filed July 2. 1962 WILL/AM MSEIBRSi WILL/AM E. eArrY THe/c A rra man Mardi 2, 1965 w. v. sPURLlN lETAI. 3,171,235

TORSION SPRING VIBRATORY FINISHING MACHINE Filed July 2. 1962 4 Sheets-Sheet 4 THE/2 Arr-anniv United States Patent Office 3,l'il,235 Patented Mar. 2, 1965 3,171,235 TonsroN sannio vmRAToRY rINrsnINo ernennen William V. Spui'lin and William E. Beatty, Indiana, Pa.,

assiguors, by mesne assignments, to Link-Belt Company, Chicago, lll., a corporation of Illinois Filed luly 2, 1962, Ser. No. 206,773 12 Claims. (Cl. 51-163) This invention relates generally to high frequency vibratory tumbling machines and more particularly to a tumbling barrel supported by tuned torsion spring means.

The cantilever spring supported vibratory barrel finishing or tumbling machine presents problems in the arrangement of the cantilever springs that vibratingly support the barrel or container. Such a cantilever spring supported vibratory tumbling machine is disclosed in copending application Serial No. 114,590, led May 4, 1961, and issued on April 21, 1964, as Patent No. 3,129,536.

rthe principal object of this invention is the provision of an abrading or finishing machine wherein the container is supported by a torsion bar spring which is much simpler to mount and more readily tuned than that of a cantilever spring. A torsion bar mounting requires materially less space to support the vibratory member and there is no problem between forces of the different springs such as associated with a cantilever spring supported vibratory finishing machine.

Another object is the provision of a simplified form of regulating the tuning of the torsion spring supported finishing machine comprising this invention. Oppositely projecting torsion springs are mounted on the barrel with their opposite ends supported by a frame and the vibratory motor is applied to the barrel to give it an oscillating movement by twisting the torsion bars which are constructed to have a predetermined natural period. By applying an isolator means between the container and the frame which may be pneumatically loaded, the vibratory system is thereby stiffened to increase the frequency of vibration by merely adding air pressure to the isolator. Thus a load container in the vibratory finishing machine of this invention may always be tuned by varying the pressure of the air in the isolators so that the load within the machine will operate at or close to the resonant frequency of the system or the most eicient operating position of the particular load being finished. The air pressure of the isolator may be controlled automatically to Vary the air pressure in the isolator and effect the proper loading of the vibratory system to operate the same close to the resonant frequency and it may be controlled remotely.

Another object of this invention lies in the construction of this torsion spring supported vibratory finishing machine wherein the container is supported by oppositely extending axially aligned torsion springs which are spaced from the center of the container to effect a feeding action around the wall of the container owing to the offset of the torsion bar springs. This is also accomplished by mounting the vibratory motor in spaced relation from the axis of the torsion bar springs and to effect a proper vibratory feed force angle on the surface of the container for feeding the materials in a predetermined path which feeding forces may be varied by varying the relative position of the vibratory motor and the torsion springs relative to the container. The container may have an arcuate bottom wall or it may be a series of fiat sections forming cords about a central portion or it may be a container with square walls and the location of the axis of the torsion springs supporting the container together with the location of the vibratory generator on the container determine the best possible feeding forces to circulate the material in a given path within the container.

Another object is the provision of the support frame of this torsion bar finishing machine to enable it to be swung or rotated so that by operating the same the articles may be conveyed from the mouth of the container and if the articles are operated in an abrasion medium, the articles may be screened therefrom or deposited in a tote box for the purpose of separating the same. Thus the vibratory power employed to circulate and create an abrasive action for linishing the materials in the abrasive medium may also be employed to feed or discharge the medium and the articles from the container when opened and inverted.

Another object is the provision of an elastomer liner for the container which avoids wear and reduces noise.

Another object is the provision of an elastomer cover that can be snapped over the mouth of the container so as to enclose the same and seal the material therein without materially increasing the weight of the vibratory system as by a heavy lid of steel or metal, of course the container may be made of any suitable material such as light or heavy metals owing to the fact that the inner surface of the container is coated with an elastomer which simplifies the structure and permits the device to be readily tuned and operate in a longer range of operation and provide a better control in obtaining the best results in finishing the productions.

Another object is the provision of a container having a drainage system flexibly connected between the container and its base to permit relative vibration between the two, wherein the base is provided with a connecting tube that may discharge the liquid laterally and through the control of the valve. This permits the materials to be nished with an abrading material in a liquid which materially aids in polishing the articles being treated and which permits the liquid to be discharged from the container during the operation of the vibratory movement and before and during the time that the container is turned over for the purpose of feeding the articles and the abrading material from the container through the loading and discharge mouth into a tote box.

Another object is the provision of a vibratory container supported by aligned oppositely extending torsion spring means that are secured to the container and secured to the base, or a pair of spaced wheels secured to each other and supported on rubber rollers that isolate the base from a supporting frame and which permit the whole of the vibratory finishing machine to be rotated to dump and wash the same. The base formed by the spaced wheels is actually capable of being revolved 360, if the cable and air line employed in operating the device are brought out axially. If they are merely connected through flexible lines, then the device can be rotated one or more times depending upon the degree of twist the lines will allow.

Another object of this invention is the provision of drive means to rotate the rotary frame of a torsion spring supported container of a finishing machine wherein the spaced wheels that form the base are supported on elastomer rollers to isolate the base from the support and which rollers are connected by shafts supported in bearings. The one shaft being provided with the rotary drive through a worm and a gear to lock the relative position of the wheel base in any desired position. The drive being connected through an elastomer coupling to prevent vibrations transmitted through the isolators to the shafts from being carried along the shaft through the drive means.

Another object of this invention is the provision of a grab bar to extend over the mouth of the container for the purpose of intercepting a loading tote box which, when raised after being intercepted, will be caused to dump its contents into the mouth of the container. This grab bar may be hingedly positioned to one side of the mouth of the container and locked in place within the perimeter of the wheel frame.

Another object is the provision of limit switches for engaging cams on the wheel base Yframe to control the limit of the dumping position and the upright operating position relative to a support.

Another object is the provision of the circuit controlling the operation Vof the finishing Ymachine and to maintain the vibratory action at the proper operating frequency in response to the vibratory action within the load by varying the air pressure within the isolators.

Other objects and advantages of this invention appear hereinafter in the following description and claims.

The accompanying drawings show for the purpose of exemplification without limiting this invention or the claims thereto, certain practical embodiments illustrating the principles of this invention wherein:

FIG. l is a View in rear elevation of the torsion spring supported vibratory finishing machine.

FIG. 2. is a view in end elevation of the structure shown in FIG. l with parts broken away.

FIG. 3 is a view in end elevation of the barrel with parts broken away and shown in section. Y

FIG. 4 is a view in horizontal section of the structure shown in FIG. 3.

FIG. is a perspective view from rear showing the barrel open before dumping.

FIG. 6 is a view of the control circuit diagram of the torsion spring vibratory finishing machine.

Referring to the drawings the support 1 consists of the channels 2 and 3 which extend the full depth of the machine, but are less in length than the diameter of the wheel mechanism. The channels 2 and 3 are connected by the cross channel members 4 and 5 which are provided with a web that is only approximately half the web of the channels 2 and 3 and which secures the latter adjacent the upper portion thereof. As shown in FIG. 2, the cross channel 5 is approximately under the center of the machine and the upper flanges of the two channel members 2 and 3 are sufficiently wide to support bearing members 6 carrying the transverse shaft 7 on which are secured the elastomer rolls 8 that function in this instance as isolators. The driving end of the shaft 7 is connected by the coupling 10 to the drive shaft 11 in the reduction gear mechanism 12 which is actuated by the motor 13. The motor 13 operates the worm 14 which in turn engages and rotates the worm wheel 15 on the shaft 11. Thus the worm wheel locks the shaft 11 against rotation when the motorris not running by reason of the worm drive. Any vibration in the shaft 7 will not be transmitted through the coupling 10 and through the shaft 11, as this coupling has a large rubber cushion to isolate and prevent the transmission of vibration from the shaft 7 to the shaft 11.

The vibratory finishing device is made up of the wheel members 17 and 1S rigidly connected by channel members 2t) and 21. These wheel members are each flanged as indicated at 22 and are supported by the cushion rollers 8 of which there are four in number, two are carried by shaft 7 and two are mounted on the bearings 6. The bearing members 6 and the bearing members 6 are secured to the top flanges of the channel members 2 and 3 as shown in FIGS. l, 2 and 5.

Loop member 23 is secured to the inner faces of the flanges at channel 2 at the rear of the machine for supporting motor 13 and reduction gear member 12 on the pillow block 24. A small foot 25, the thickness of the lower flanges of the channel 2kis provided at the loop 23 to provide support under the motor 13. Thus by rotating the motor the base frame 26 may be made to rotate on the rollers or casters 8 being made of rubber or some suitable elastomer will function as isolators.

The base frame 26 is in fact the reaction base for the vibratory member 27 which in this case is an upwardly open container or barrel 28. VThe barrel 28 is provided with the open spring clamp boxes 30 and 21 for receiving therein the torsion bar springs 32 that are clamped in place under the block member 33 by the cap screws 34. These open spring clamp boxes 30 and 31 are Welded to the sides 35 of the barrel 28. There are shown three leaf springs in each assembly. Each of these leaf springs are separated by a space member which is preferably an aluminum spacer 36 which is sufliciently hard to prevent the aluminum spacers from flowing due to the clamping pressure, but will provide relative movement between the spring members and within the elastic limit of the aluminum spacers without permanent deformation.

These leaf springs extend from the open spring clamp boxes 3l? and 31 to the open spring window members 37 and 38 on the wheel members 17 and 18. These boxes are the same size and also provided with the cap screws 34 which bear against the spring clamping bars 33 and 38 as shown in FIG. 2. Thus the springs 32 support the barrel 28 and are so disposed as to permit the barrel to reciprocate about the longitudinal axis 40 on the torsion bar spring members as indicated by the line in FIGS. l and 2.

The sides 35 of the barrel 28 extend downwardly and are preferably reduced at their lower end to a section somewhat similar to an inverted frustrum and are provided With the T-brackets of the vertical member 43 and horizontal member 42 as shown in FIGS. 2 and 3. These side plates also are connected together by the wall 43k which forms the wall of the container or barrel proper and in this instance is straight along its upper sides as rindicated at 44 and is arcuate following a broken fixed radius as indicated at 45. The axis or center of this radius is shown at 46 and is in line with the longitudinal axis 40 of the springs 32 and is also in line with the rotary axis 47 of the vibratory generator 4S. These three axes lie in a common plane. This generator is secured to the mounting plate 50 and is in turn welded to the angle member 54 which in turn has its ends welded to the plates 35 and also extends upwardly to the angle member 55 that is likewise welded to the underside of the mounting plate 50 and turns outwardly to provide a rim at the rear of the mouth 56 of the barrel 28. The straight portion 44 of the barrel is slightly shorter at its opposite ends so as to receive the angle member 57, the upper surface of which tis flush with the flange of the angle 55 and other angle member being shaped as a triangle and being secured to the inner face of the wall 44 of the barrel to stiften the same. The parallel stiffener plates 5S and 59 are shown connected to the mounting plate 50 together with the angle members 54 and 55 and the spring clamp boxes 33 as indicated in FIGS. l and 3.

The opposite straight portion 43 of the barrel 35 also has an angle member 60 welded thereto. Elastomer liner such as rubber member 61 is vulcanized to angle 66 and covers the whole of the face of the barrel member along the walls 43' and 45 adjacent the end 34. The rubber lining comes over the angle 57 and out over the angle bracket 55. The inner face of the side plates 35 are also covered with a rubber liner 61 which has the corrugated members 62 extending therealong for the sole purpose of providing an uneven surface that prevents any parts from sticking thereto or otherwise adhering.

The cover 63 is Van elastic member that has an inturned groove that snaps over the perimetral flange of the rub` ber and the corresponding parts defining the mouth or the top of the barrel. The bottom of the barrel 28 is provided with discharge 65 which supports the screening e6 and provides the spout 67. The spout 67 is sufficiently large to receive the end of the hose member 68. The other end of the flexible hose 68 is secured to the spout 69 on the lateral discharge pipe 70, the one end of which is closed by the cap 71 and the other end is provided with the valve 72. The container 73 may be placed under the valve 72 and regardless of the position of the reactive base member 26, a liquid discharge from the barrel 2S will sump regardless of the rotary position of the finishing machine. The hose members 68 are secured by the clamps 73 at either end thereof. The pipe 70 extends through the walls of the wheel members 17 and 18 Iand it may be provided with a slight cant towards the valve 72. Thus the valve 72 may be opened and the material continue to flow within the barrel 28 to insure that most or all of the liquid is drawn from the barrel before the latter is turned up for discharge.

The T member formed by the brackets 42 and 43 on the lower end of each of the side plates 35 have the pneumatic isolators 74 and 75 secured to the vertical plate 43 and at opposite ends are secured to the brackets 76 and 77 on the inner face of the wheel members 17 and 18. These isolators are connected by the lines 7S which join at the T 79 and extend to the T member 80 and thence through the wheel member 17 for connection to the exterior as indicated in FIG. 2 to the line for the opposite side of the device as indicated at 81, and extends along the upper edge of the transverse channel member since the pneumatic isolators are secured relative to the base frame 26. There is no relative movement and these lines may be copper tubing or the like, however from the connection 80 to the support member 1, a flexible coupling may be employed at 82.

The vibratory rotary motor or generator 43 hals its eccentric weight in the center part enclosed by the housing and the motor S4 itself is enclosed in a circular housing. The motor S4 is connected by the line 85 which is suiciently flexible between the motor itself and the plate of the wheel 17 where a block is provided as indicated at 86. A flexible connection 87 is provided to extend the same to the support 1 edge and does not restrict the rotation of the reaction base frame 26 through 360 and permits the same to operate regardless of position that the drum is held.

The rotary vibratory motor 84 is preferably electrically driven and is preferably provided with the speed of 1750 r.p.m. The natural period of the system without any pressure in the isolators 74 and 75 could be tuned to a frequency of 1750 vibrations or some point below the natural period of vibrations which in this instance would be the same as the speed of the motor. When air is added to the isolators 74 and 75 it has the effect of simulating a stiffening of the springs and thus reduces the amplitude. If the resonant period is above the operating speed, then the load machine may be driven to and controlled to allow the amplitude to increase to the point of resonance and decrease upon further dampening action to the isolator 74 and 75. In this manner a decided measure of control may be had by changing the pressures within the isolator 74 and 75. This air pressure control may be located at the machine or may be positioned remotely and used in combination with a meter that determines the reading of the relative vibrations and their amplitude. This control may also be provided with a variable voltage to vary speed of the motor 84.

Referring to FIG. 3 the rotary eccentric weights of the vibratory motor 48 creates a twisting action around the center longitudinal axis 40 of the springs 32, and as illustrated in FIG. 3 the driving force is represented by a force at the end of a radius drawn from the center axis 40 and at right angles thereto where the radius intersects the inner surface of the barrel 28. It is shown by these force factors that the location of the springs and the position of the motor relative to these torsion springs supplies a feeding action which is all along the surface of the barrel and as a matter of fact the feed may be such that it will actually feed the material up and over the lip through the mouth of the barrel and particularly when the barrel is tilted to some degree from the vertical to the horizontal position. The whole of the barrel may be emptied by the feeding action or the action that creates circulation -along the path as indicated by the outline 90 which shows the circulating path of the material and the angle at which the material returns to the left side of the barrel as shown in FIG. 3 which is somewhat less than the natural angle of repose of the material because of this vibratory action between, the material will follow the path indicated by the line 90 and carry the parts that are being polished or otherwise finished with this circulating abrading material. The addition of liquid to this vibratory action in flowing the abrading material as a fluid merely makes the smaller abrading particles more buoyant and the scrubbing action more delicate on the parts themselves.

Thus the liquid may be strained and drained from the barrel during its operation; the barrel may then be rotated by rotating the wheel base frames till the path 90 is horizontal or tilted in the opposite direction and permit the motor to continue to operate and cause a feeding action to spill the material into a tote box between the channels 2 and 3 and at the same time the liquid is discharged to the tote box 72. After the reaction base frame 26 is again set in position as illustrated in FIG. 2, the load bar structure 92 is unclamped from the toggle clamp as illustrated at 93 and operated by lever 94, releases the bar 95 and allows the legs 96 to be swung upwardly so that the round toe 97 of its foot 98 may be swung around the pin 99 and on the surface of the bracket member 100, and when the legs 96 reach the vertical position, the sole of the foot 98 is shoved to the right allowing the pin 99 to pass towards the heel of the slide 101 `and thus lock the legs 96 in their vertical position as indicated. When the load bar is in this position the loading tote box as illustrated at 102 and which is suspended from a hoist by the bar member 103 is permitted to have its dumping fulcrum member 104 engage the bar and when the tote box is raised, the material spills from the front thereof. The material then drops into the barrel and after it is loaded the legs 96 are shoved rearwardly on the pin 99 and the load bar 92 is again swung to the position as shown in dotted lines in FIG. 2 and locked. In this position the load bar 92 is at no time in the road during the operation vof the barrel or during the time the barrel is drained and discharge-d,

Referring now to FIG. 6 the motor 13 of the vibratory generator 48 is a three phase motor 84 supplied from the three phase line indicated at L1, L2, .and L3. Each line. being opened by disconnects and protected by fuses. This circuit is arranged to permit the motor 13 to either be driven in a forward direction or reverse directions which are obtained by the alternate use of the interlocked F and R relays. The forward relay having a Contact F1 in line 1 and F2 for line 2 and F3 for line 3. The reverse relay R is likewise provided with the contacts R1 and R2 and R3, however, where the F contacts connect the motor directly to the lines 1, 2, .and 3, the R contacts shift two of the three phase lines. R1 connects line 1 to the motor line 105 and R2 connects the line L2 to the motor line 106, whereas R3 like F3 connects line 3 to the motor line 107. Thus by reversing the two phases of this three phase motor one efects a reversal. In this manner the motor 13 is reversed to dump the contents of the barrel and then return it to its upright position. The line L1 passes through the normally closed stop push button 108 to the line 109 and thence through the normally closed reverse push button 110 which is interlocked with the normally opened push button 111 and from the normally closed reverse push button 110 the line is connected to 112 thence to the normally opened forward push button 113 which, if depressed, opens the normally closed forward push button 114 and permits line 2 to be connected directly to the forward relay F through the line 115. The opposite side of this relay F is connected through the LS1 normally closed back Contact and the line 116 together with the two normally closed overload contacts OL1 `and OL2 to line L3. When this circuit is completed, the F contacts F1, F2, and F3 are closed and likewise thenormally 7 opened F4 which is a stick contact and retains the F relay energized until the same is de-energized either by the stop push button 16S or limit switch contact LS1, or either of the over load contacts OL1 and OL2.

The reverse relay R is energized in the same manner to connect line 109 through the normally closed forward push button 114 to line 117, thence through the reverse normally opened push button 111 to line 118 and the relay R, the other side being connected through the limit switch LS2 to the line 116 and overload contacts OLl and OL2 to line 3. When the R relay is energized, each of the contacts R1, R2, and R3 are closed and likewise R4, the latter being a stick circuit around the push button 111 to retain this relay closed until it is opened by the LS2, the stop push button 108 or either of the stop contacts OL1 and OLZ. Thus an interlocking circuit is maintained between the R and F relays by means of the interlock push buttons 11G and 111, 113 and 114.

The vibratory motor 84 is likewise three phase and is connected to each of the lines L1, L2, and L3 through the relays MC1, MC2, and MCS. This MC relay is energized from line 1 through the control switch 120 that has an automatic operating position when the manual operating position is on as shown, L1 is connected to line 121 and the stop push button 122 and the start push button, normally closed push button 121, the line 123 and the normally opened start push button 124, thence the line 125 and one side of the MC relay the opposite side of which is connected through the normally closed overload contacts OL3 and O14 to line L3. When the MC relay is energized, its contact MC4 provides a stick circuit in multiple with the start push button 124 and maintains this push button closed until the overload contacts OL3 and OL4 interrupt this circuit or the stop push button 122, or even the throat of the control switch 120 from manual to automatic. As soon as this circuit is completed, the MC contacts 1, 2, and 3 supply current to the motor 84 to operate the same. The MC1 and MCS contacts have in series therewith the overload relays OLa and OLb. The OLa relay contains the odd OL contacts and the OLb contains the even OL contacts.

When the control 110 is switched from manual to automatic, line 1 is connected to line 126 which is one side of the automatic reset interval timer 127. The other side of which is connected to L3 and line 125 is connected to another contact in this automatic interval timer 127 to operate the same. Thus when the control switch 120 is in its automatic position, power is supplied to the automatic reset interval timer 127 and is fed therefrom the line 125, then the MC relay 1 of course operates the motor 84 through the timer and in through its own stick circuit and when the timer is iinished the relay is de-energized causing the motor 84 to stop.

We claim:

l. A torsion spring vibratory material handling machine consisting of a container for handling the materials, tuned torsion spring means secured to and extending laterally in opposite directions from said container, a frame extending on both sides of said container and having windows in which to receive the other end of said torsion spring means and secure the same thereto to support said container for vibratory reciprocation, vibratory reciprocating motor means mounted on said container in radial spaced relation to the axis of said torsion spring means to reciprocate said container for handling materials there- 2. The structure of claim 1 characterized in that said torsion spring means includes two sets of oppositely disposed spring members in alignment with each other to support said container within said frame.

3. A torsion spring vibratory material Vhandling machine consisting of a container for handling materials, tuned torsion spring means secured to and extending laterally in opposite directions from said container, a frame @Xilelldilg Qn both sides of said container and having windows in which to receive the other ends of said torsion spring means and secure the same thereto to support said container for vibratory reciprocation, vibratory recipoeating motor means mounted on said container in radial spaced relation to the axis of said torsion spring means to reciprocate said container for handling materials therein, tuning means secured between said container and said frame and radially spaced from said torsion spring means, means to vary the stiffness of said tuning means to add stiffness to the vibratory movement of said container and change the tuning of the same.

4. The structure of claim 3 characterized in that said torsion spring means includes oppositely disposed leaf spring members in alignment with each other to support said container within said frame.

5. The structure of claim 4 characterized in that said tuning means includes a pair of opposed air cushions supported from said frame and on each side of Said frame, and means on said container interposed between each pair of air cushions and means to control the air pressure in said air cushions to vary the tuning of the reciprocation of said container.

6. The structure of claim 5 characterized in that said frame is a pair of spaced wheels secured to each other with said container suspended therebetween, two pairs of aligned resilient rollers mounted on journals to support said wheels, a hose, motor drive connected to at least one of said shafts to turn the resilient roller and rotate said wheels'on said resilient rollers, said motor drive having a worm and gear train to lock said rollers and wheels when not rotating, an elastomer coupling between said motor drive on said one shaft, and a exible pneumatic line to connect said tuning means and said base.

7. The structure of claim 3 characterized in that said torsion spring means .are positioned to one side of the center of said container and said vibratory reciprocating motor means and said torsion spring means are aligned with each other and said isolator means are positioned below the center of said container.

8. The structure of claim l characterized in that said frame is a pair of spaced wheels secured to each other with said container suspended therebetween, and two pairs of aligned resilient rollers supporting said wheels to isolate said frame.

9. The structure of claim 8 characterized by a liquid discharge means in said container, a lateral tube supported between said wheels, and flexible hose means between said discharge means and said tube to direct the discharge of liquid from said container.

l0. The structure of claim 8 characterized by a shaft connecting a pair of said aligned resilient rollers, a motor drive connected to said shaft and having a worm and vgear train to lock said rollers when said motor drive is not rotating, and an elastomer coupling between said motor drive and said shaft to absorb any vibration transmitted lto said shaft from said drive.

11. The structure of claim 1() characterized by a base to support said motor drive and said rollers, and flexible line between said vibratory reciprocating motor means and base.

l2. The structure of claim 1 characterized in that said vibratory motor is a rotary vibratory motor.

References Cited by the Examiner UNITED STATES PATENTS 2,973,606 3/61 Brandt 51--163 2,993,585 7/61 Musschoot 51-163 2,997,813 8/61 Brandt 51-163 2,997,814 8/61 Brandt 51-163 FOREIGN PATENTS 665,523 9/38 Germany.

LESTER M. SNINGLE, Primary Examiner.

JOHN C. CHRISTIE, Examiner. 

1. A TORSION SPRING VIBRATORY MATERIAL HANDLING MACHINE CONSISTING OF A CONTAINER FOR HANDLING THE MATERIALS, TUNED TORSION SPRING MEANS SECURED TO AND EXTENDING LATERALLY IN OPPOSITE DIRECTIONS FROM SAID CONTAINER, A FRAME EXTENDING ON BOTH SIDES OF SAID CONTAINER AND HAVING WINDOWS IN WHICH TO RECEIVE THE OTHER END OF SAID TORSION SPRING MEANS AND SECURE THE SAME THERETO TO SUPPORT SAID CONTAINER FOR VIBRATORY RECIPROCATING, VIBRATORY RECIPROCATING MOTOR MEANS MOUNTED ON SAID CONTAINER IN RADIAL SPACED RELATION TO THE AXIS OF SAID TORSION SPRING MEANS TO RECIPROCATE SAID CONTAINER FOR HANDLING MATERIALS THEREIN. 